Paper container



March W, 1%fi. c. L. MARSHALL PAPER CONTAINER Filed oot '9, 1954Patented Mar. 1 0, 1936 UNITED STATES-PATENT OFFICE PAPER CONTAINERClifford Lancaster Marshall, Newark, N. 3., assignor to Mono Service(30., Newark, N. 3.

Application October 9, 1934, Serial No. 747,586

3 Claims. (craze- 51 This invention relates to paper containers such asare describedfin the specifications of Elmer Zebley Taylors UnitedStates Patent No. 1,961,-

535 and Edmund Paul Herrmanns United States 5 Patent No. 1,963,994, inboth of which containers such as are applicable for use in the deliveryof milk and the like are described. These containers comprise a conicaldouble-walled body and suitable end closures, and it was proposed toopen them by tearing out -a strip of material between two weakeninglines suitably disposed for the purpose.

The object of the present invention is to simplify the method ofopening, and it consists in forming the container with a singlewea'kening line around the outer wall thereof and a cut around the innerwell, this weakening line and out being so disposed that by pressing theside of the body inwardly immediately below the weakening line thelatter will be broken, when the upper end of the container can begrasped and the breaking completed by a hinging movement, enabling theupper end of the body with the closure secured therein to be removed,exposing part of the outer surface of the inner wall, the upper edge ofwhich will be smooth and clean owing to the presence of the cut, andover which the contents can be poured if of liquid form. If

desired the separated top and closure can be replaced to form a cover ifall the contents have not been removed.

The invention is illustrated in the accompanying drawing, in which Fig.1 is a plan view of the blank for the body, Fig. 2 a side view of theupper endof a container, Fig. 3 a sectional view thereof showing themethod of opening, and Fig. 4 a similar view of the opened containerwith the removedtop readyto be applied as a cover. Fig. 5 is a detailview of the preferred form of the weakening line in the outer wall ofthe body.

In Fig. 1 of the drawing it will be seen that the blank Ifor the body isformed with a weakening line 2 in that part A which is to form the outerwall when such body is rolled up, such weakening line being preferablyas shown in Fig. 5 formed by a double series of perforations 5 of whichthose in one row are opposite the spaces between those in the other row.The weakening line 2 is preferably arranged parallel or approximately sowith the edge of the blank I, and from its inner end a cut 3 extendstowards such edge, and then continues parallel or approximately sotherewith around the part B of the blank which is to form the inner wallof the body.

To facilitate the rolling-up operation, particularly when this iseffected by automatic machinery, it is preferred to interrupt the cut 3at suitable intervals, as I, which will have the elfect of holding theblank together, so that there will not be a narrow loose end, consistingof the part 5 marked 6, depending from the blank, and which mightinterfere with the rolling operation.

The blank I is intended to be rolled up to form a conical double-walledbody the smaller end of which is shown in Fig. 2 in elevation, and inFig. 3 10 in section. Into this smaller end a closure such as I isinsertedin the course of manufacture, the other or larger end being leftopen until the container has been filled, after which a suitable closureis also to be inserted therein. It is intended that the container shallthen be reversed so that the smaller end in which the opening meansdescribed are formed becomes the top.

When it is subsequently desired to open the container this canbe'readily effected by press- 20 ing on the side of the containerimmediately be neath the weakening line 2, as shown in Fig. 3, wherebythe material of the outer wall willbe broken along the weakening line.When this has been done the upper end of the container is to 2'5 begrasped at the point 8 (Fig. 3) and the-breaking of the material alongthe weakening line completed by a hinging movement. This movement willalso break the interruptions 4 if same are formed in the cut 3, so thatthe entire top with 30 the closure I can be removed.

In the rolling operation themechanism employed for applying adhesive tothe blank is so arranged that such adhesive shall not be applied to thepart thereof which when the body is rolled 35 up is between theweakening line 2 and the cut 3, the subsequent treatment with paraffinwax or other material giving sufficient adhesion at this point until thecontainer is opened, but readily yielding when this is done. v 40 If theremoved top is to be subsequently used as a cover it is preferred thatthe cut 3 should beformed at such a position in the blank I that whenthe container. is made upv it willbe slightly above the under surface ofthe closure I, as shown 45 in Fig. 4, so'that a slight groove 9 will beleft when the top has been removed, into which the remaining upper edgeof the container (left by such cut 3) will enter if the top is replacedtoserve as a cover, so making a good joint, which will be assisted bythe small fillet of wax, shown at Iii in Figs. 3 and 4, which is usuallyobtained in carrying out the waxing operation. Before replacing the topto use it as a cover the part of the upper edge of the body which was 55mately parallel with the edge of the blank from which the container bodyis made but extending around the outer wall only, and connecting with acut around the inner wall also approximately parallel with the edge ofthe blank but nearer such edge than the weakening line in the outerwall, as set forth.

3. A double-walled conical paper container provided with means foropening same comprising a single weakening line extending around theouter wall, and connecting at its inner end with a cut extending aroundthe inner wall with the exception of interruptions at suitable points,as and for the purpose set forth.

LANCASTER MARSHALL. l5

